Power-actuated switch-control system.



G.B."GRAY. Q POWER ACTU'ATEDv SWITCH coN'TRoL SYSTEMIv APPLICATION FILED APR.113.1914. RENEWED FEB. I2, 1916. 1 9 1 @9111;1 1 m Patent-ed Sept. 12, 1916.

3 SHEETS-SHEET l.

G. B. GRAY.

POWER ACTUATED SWITCH CONTROL SYSTEM. l APPLICAHNHLED APR. 1a. 1914. RENEWED FEB.`12.1916.

Patented Sept. 12, 1916.

3 SHEETS-SHEET 2.

abholen@ Y a? f eeRAY.

POWER ACTUATED SWITCH CONTROL SYSTEM. APPLICATION FILED APR. I8. 1914.l RENEWED FEB. 12.1916.

Patented Sept. 12, 1916. 3 SHEETS-SHEET 3 y .New

N QQ@ I/I//lT/VESSES .all in POWER-ACTUATED SWITCH-GONTROL SYSTEM.

Liaaoai.

Specification of Letters Patent.

Patented Sept. l2, 1916.

Application med April 1s, 1914, seriai No. 332,722. Renewed February 12', 191e. serial no. 78,068.

To all whom 't'mag/ conce/rn.'

Be it known that I, GARDNER B. GRAY, a citizen of the United States, and a resident 'of Pittsburgh, in the county of Allegheny Aand State of Pennsylvania, have invented certain new and useful Improvements in Power-Actuated Switch-Control Systems of which the followingis a specification.

The present invention relates to power actuated switches used yat railroad. terminals e preventing the application of power to the.

switch machine. Furthermore, if the lockrod is unlocked and the 'switch moved manually, as by a malicious person, safety means to counteract such movement should be provided. v

Accordingly the main feature 0fthis invention resides in making the switch machine self protecting, so that, even if power improperly reaches it, such power will tend to lock the switch machine and switch in the position which they occupy. And should rit be attempted to unlock the lock-rod or to move the 'throw-rod and thereby the switch, power will immediately be applied to restore the parts to their original position.

The complete actuation of the switch requires substantially three distinct steps, namely, unlocking, moving and relocking the switch. At the present time these steps are performed in one continuous operation. Inv

the herein disclosed preferred embodiment of the invention this operation is performed by stages instead of vin lone continuous operation, and preferably, as in the precise disclosure here made, step by step.l The advantage of this is that means are provided whereby 'the operatingmeans are prevented from effecting any stage of operation unless the previous stage has been completed.

Another feature of the invention resides in a construction whereby power is normally cut ott from the operating means for the switch, and in an auxiliary locking means for the switch through which, and through which only, power can be supplied whether properly or falsely, to the operatingy means, together with a controller, actuated by the movement of the operating means, for cutting off power between the means for supplying power to the operating means and ,the latter. The effect of this is that if the power is falsely supplied, the movement of the controller of the operating means will not cut off power and consequently the auxiliary locking means will continue to hold the switch in its locked position. i

Other features of construction, combination of parts and arrangement of elements will appear as the specification proceeds.

In the accompanying drawings the invention is embodied in a concrete and preferred form but changes may be made within the scope of the appended claims, without departing from the legitimate and intended scope of the invention.

In the said drawings: Figure l is a diagrammatic view of a preferred form of a power actuated system of switch and signal control embodying the invention. Fig. 2 is a plan view of the switch and switch mal chine. Fig. 3 is a longitudinal sectional view of the differential transmission mechanism. Fig. 4 is a perspective view of interlocking means which may be used between the two levers of the controlling means in the tower machine. Fig. 5 is a detail view of the crank 'l' and throw-rod 3. Fig. 6 is a detail View of the lock-rod 2 and member 56. Fig. 7 vis a detail view of one of the levers 21-22- Fig. 8 is a development of the cam 1l which actuates the controller 10.

Similar characters of reference indicate corresponding parts in the different views.

1 indicates the switch or switch points. 2 is the'lock-rod and tlie throw-rod, both of said rods being suitably connected to said switch in a well-known manner.

4 is the motor, 5 the 4differential transmissionmechanism, 6 the driven shaft having the crank 7 engaging in a suitable notch 8 in the throw-rod 3. f

15 is the auxiliary locking device for the f lock lever,

locking member of the lock-rod and 16 is the auxiliary locking device for the throw-rod.

17 is a diagrammatic representation of the usual detector bar which may be connected up to the locking member 13 of the switch machine;

18 is a signal post along the line of way, 18a and 18b the semaphores thereof, and 19a and 19b are the motors therefor.

21 is a lock lever. 22 is a switch lever, and n is a signal levercontrolling the semaphores.

23 lis a controlling means actuated by the 24 is a controlling means actuated by the switch lever and 24a is a controlling means actuated by the signal lever.

25 is the source of power for operating the switch and signals.

The movement of the contact 26 of the con`- trolling means 23 from engagement with the springs 27 and 28 into engagement with the springs 29 and 30, establishes a circuit as follows: from battery 25,l to bus bar 31,

through conductor 32, conductor33, spring 29, contac t 26, spring 30, conductor 34, tov

spring 35, contact 36, spring 37, conductor 38, to auxiliary lock solenoid 16 and common return 39`,.to battery 25. This energizes the lock solenoid 16, vdrawing the core 40- thereof upward and causes the locking dog 41, pivoted at 42, to move downward at its` outer end so as to engage the locking collar 43 on the driven shaft 6, and at the same time moves the contact 44 from engagement with the springs 45 .and 46 into engagement with the springs 47 and 48 and the contact 49 into engagement with the springs-50 and 51. This establishes .a circuit as follows: from conductor 38, conductor 52, spring 48, contact 44, spring 47, conductor 53,to` theY coil 54 of 'lock solenoid 14, conductor 55, spring 51,

contact 49, spring 50 and common return 39. The energization of the coil 54 of the lock solenoid 14 moves the locking member 13 to the left (Figs. l and 2)-, u the projection 5.6 out of notch 600 in the lock-rod 2, thus releasing the same or unlocking the switch. At the same time the contact 36 is moved out of engagement with the springs 35 and 37/ and the contact 57 con.` 'nects up the springs 58 and 59.' This cuts oil power between the controlling means 23 and the actuating means or lock solenoid 14, and auxiliary locking device or solenoid 16, thereby denergizing 54 and 16 and causing the core 40 to move downward and the locking dog 41 to freeitself from en- .gagementwith the locking collar 43.

will further benoted that when the auxil- 'iary locking device. 16 was energized it ruptured the signal circuit 60 by moving the contact 44 out of engagement with the springs 45 and 46 and that the locking member 13 by moving-,to the left also ruptured the signal circuit 60 by moving the contact thereby drawing 61 out of engagement with the springs 62 and 63. While the signal circuit 6() therefore is restored by the .denergization of the auxiliary locking device 16 at that point, it remains ruptured at the point where it passes through the controller of the locking :.105 as contact 57 will at once be moved to the left (Fig. 1) 'to bridge the springs 58 and 59. This would immediately hold the locking member 13 in a mid yposition in` whichv position. the switch is still locked, while at the same time shaft 6 is also held locked and these conditions will continue so long as current Hows. Again assume that current has been improperly supplied along the conductor 38 by a cross or otherwise,

then the auxiliary locking .device 16 will first lock the shaft 6'and then energize coil 54 so as to move the locking member 13 to the left (Fig. 1), and, as before,`it will be held in mid position. Furthermore the signal circuit 60 will also remain ruptured in both of these cases at the point where it passes through the controller' of the auxiliary locking device 16.. The first stage of the cycle of operations of the switch now having been accomplished, the operator moves the lever 22 to the left, thereby moving the contact 64 'out of engagement with .the springs 65 and 66 of the controlling means 24 and placing contact 64 between.

the springs 67 and 68. The movement of the contact 64 into the position designated will establish a circuit as follows: from battery 25, bus bar 31, conductor169, conductor 70, spring 67, contact 64, spring 68,- conductor 71, spring 72, contact 73, spring 74 of the controller 10, conductor 7 5, reverse magnet 76, conductor 77, to auxiliary locking device .15, and thence'to common return 39 and bat- Qtery 25. The vreverse magnet 76 forms a part of the selective means between the motor and the-driven shaft 6 and when energized tightens the band 78 on the drum 79, which thereby selectively connects the motor 4 to drive the shaft 6 in a certain direction. The energization of the auxiliary locking device 15 causes the core 80 thereof to bc moved upward, thereby moving the contact 81 away from the springs 82 and 83 so as to break the continuity of the signal circuit 60 at that point and move said contact into enagement with the springs 84 and 85, and atv the same time causes the contact 86 to bridge the space between the springs 87 and 88. This establishes a circuit as follows: from the conductor 7 7 to conductor 89, spring 84C, contact 81, spring 85, conductor 90, motor 4, motor field 91:, conductor 92, spring 88, contact 86, spring 87 and common return 39, back to battery 25. This causes current to flow through the motor 4 which by its rotation and by means of the reverse magnet 76 and the differential transmission mechanism, causes the shaft 6 to be driven in a certain direction whereby the crank 7 engaging with the notch 8 of the throw-rod 3 moves the latter and throws the switch to reverse position. The rotation of the shaft 6 causes the cam 11 to lactuate the controller 10, whereby the contact 7 3 is moved to the right (Fig. 1) and is out of engagement with the springs 72 and4 74:, thereby cutting ofi' all power between the source 25 and the controlling means 24 and reverse magnet 7 6 and auxiliary locking device 15, whereby 76 and 15 are both denergized. This releases the band 78 from its'clutched position and de stroys the circuit through the motor, restores the signal circuit 60 at the point where it passes through the auxiliary locking device 15 and causes the branch 60 of the signal circuit 60 to be ruptured by the movement of the contact 93 away from the springs 94 and 95. in the controller 10, and closes the branch 60b of the signal circuit 60where it passes through the controller 10 by causing the contact 93 to engage the springs 96 and 97. The movement of the switchv further places the normal Amagnet 108 ready to be energized by moving the contact 99`into engagement with the springs 100 and'101 in the controller 10. llt will be observed that the signal circuit 60 is still ruptured where it passes through the controller of the locking member 13. v

It will be observed that had current been supplied to the motor 1 before the locking dog 56 had released the lock-rod 2, the energization of the auxiliary locking device 15 would have caused the lower end of the core 80 to have engaged in the notch 102 of the C locking member 13 so that, while the motor L would have rotated, the lockrod and the locking member therefor would both have been locked and the signal circuit would have been ruptured at the point where it passes through the controller of the auxiliary locking device 15.

The second stage of operation of the -switch having been completed the operator now moves the lever 21 back to the right, thereby causing the contact 26 to bridge the space between the springs 27 and 28. This establishes the following circuit: from the battery -25 to bus bar 31, conductor 32, spring 27, contact 26, spring 28, conductor 103,

\ spring 58, contact 57, spring 59, conductor drawing the locking-member 13 to the right (Fig. 1), thereby causing the dogy 56 to engage in notch 601 of the lock-rod 2, thus locking the switch. At the same time the contact 61 bridges the space between the springs 62 and 63 and completes the signal circuit 60 at that point, thereby permitting the clearing of signal 18h for the passage of tratic by moving the lever 20 to cause the contact 20b to engage springs 2Oc and 20d in controller 24 thereby supplying power to motor 1,91 This completes the third stage of operations and also one complete cycle of movement of the switch.

When it is desired to move the switch from the reverse position to the normal position the lever 21 is moved to the left and the first stage of operations, as previously described, repeated. The operator now moves the switch lever 22 to the right and breaks the contact 64 between` the springs 67 and 68, and causes it to bridgel springs and 66, thereby establishing the following circuit: from battery 25 to bus bar 31,'conductor 69, spring 65, contact 64, spring 66, conductor 106, spring 101, contact 99 spring 100, conductor 107 to normal magnet 108, conductor 77, to auxiliary locking device 15, and thence to common return 39, back to battery This energizes the said normal magnet 108, causing the band 109 to be tightened on the pulley 110, and further causes the energization of the auxiliary locking device 15 and an upward movement of the core 80. This establishes the following circuit: from conductor 77, to conductor 89, spring 84C, contact 81, spring 85, conductor 90, to motor 4, motor fieldI 91, con` d uctor 92 spring 88, contact 86, spring 87, and common return 39. This rotates the motor 4 which by means of the differential transmission mechanism 5 and the normal magnet 108 causes the driven shaft 6 to rotate ina direction opposite to that from which it rotated on the reverse movement, thereby causing the crank 7 to engage in the notch 8 of the throw-rod 3 and move the switch back to normal position. The movement of the shaft 6 further causes the cam 11 to move the controller 10 to the left (Fig. 1), thereby moving the contact 99 out of engagement with the springs 100 and 101 and thus cutting` off power between the confrom engagement between the springs 96 and 97 into engagement with the springs 94 and 95, thus breaking signal circuit 60b and closing signal circuit 60a at that point.

25 member 13, by a malicious person or other- This completesthe second stage of operations 4of the normal movement of the switch. The lock lever 21 is now moved to the right to lock the switch vin the same manner as describedgn connection with the reverse movement of the switch so that the switch is now locked and the third stage of operation completed, and the complete cycle of movement of the switch to normal is finished. The signal 18l1 may now be cleared by supplying power'to the motor 19L by means of the lever 20a. A

It is obvious *that the same safe-guards that were pointed y. out in connection with theunlocking, moving and locking of the switch on the reverse movement obtain on the normal movement.'

. .When the switch is in either of its posif .tions and locked up, it is'cut off from all power and is, as described, capable of nullifyin'g the eii'ectof any improperly supplied current, in that the application of suoli current toV the'switch machine only serves to lock it additionally.' Should it now be attempted to forcibly move the locking wise, so as to Cause the lock-rod 2 to be unlocked, it is evident that such movement will cause the contact member 57 to engage between the springs 58 and 59. This vwill immediately establish a circuit from battery 25 to bus bar '31, conductor 32, spring 27, contact 26, spring r28, conductor 103,

spring 58, contact 57, spring 59, conductor 104, coil 105 of locking solenoid 14, common return 39, back to battery 25. The ei'l'ect `of this circuit, as previously pointed out,

lock-'rod 2, then the very act-of moving the vsaid throw-rod will cause a movement of the vcontroller 10. If the switch iwere in the normal position and is moved to the reverse position, the contact 99 will bridge the springs 100 and 101 and a circuit will beestablished from battery 25, bus bar 31, conductor 69, spring 65, contact 64, spring 66, conductor 106, spring 10:1, contact 9 9, spring 1100,'cond-uctor 107, normal magnet 108, con;

"ductor 77, auxiliary locking device 15 toA common return 39, back to battery 25. This circuit would in turn,'byl'reason of the energization of the auxiliary locking device 15, cause a circuit to be established through the motor as follows': conductor 77, conductor 89, spring 84, contact 81, spring 85,

yconductor 90, motor 4, motor field 91, .con-

ductor 92, spring 88, contact 86, spring 87 and common return 39. The eiect of this circuit would be to cause a movement of the switch back to its normal position. Similarly if the switch is in the reverse position and it should be attempted to move it to the normal position by a physical displacement of the throw-rod 3,l a circuit would be established as follows: from battery 25, to bus bar 31, conductor 69, conductor 70, spring 67, contact 64, spring 68, conductor 71, spring 72, contact 73, spring 74, conductor 75, reverse magnet 76, conductor 77, auxiliary locking device 15, to common return 39, back to battery 25. The energization of the auxiliary locking device 15 would, as before, establish the circuit through the motor 4 and thus cause the switch to be moved to reverse position. It will further be noted that, if the switchrod 3 or the locking member 13 should be maliciously moved in the manner above described, the signal circuit 60 through these various controllers would be ruptured and prevent the giving of a signal for the passage of traffic. A still further advantage of the system is that if the operator after throwing the lock lever 21, say to unlock the switch, should` change his mind, the reversal of the said lever 21 would immediately restore the switch to its locked position without affecting the switch moving means in any way. This advantage is obtained as follows: The mechanical connnection between the cam 11 en shaft 6 and controller 10 and between coro 13 and controller 12 are so arranged that while 11 or 13 makes a complete movement in cithei` direction, the controllers 10 and 12 are given two intermittent motions. In the case of the controller 12 and core 13 this may be effected as follows: Connected to the controller 12 is a link 13a pivoted at 13b and provided with a member- 13c rigidly connected to said link and having the end stops 13d and the intermediate stops 13". Carriedby the core 13 isa projection 13. VV'hen the parts are in the position shown in Fig. 2 and the coil 54 is energized the projection 13f willengage one of the intermediate stops 13 and will thereby move the link 13anntil it occupies a central position permitting the projection 13t lto continue its movement without imparting further motion to the link 13a. The eiiect of this is to move the controller 12 sufiiciently to cause the contact The continued movement of ond movement to controller 12 which brings lthe contact 36 out of engagement `with the a connection is immediately established permitting the return movement of the core 13, so that the locking member will follow the movement of its lever 21.y The return oircuit which could be established in.this manner has previously been described.V

ln the case of the controller 10 and cam lllthe action is as follows: The crank 7 moves about 15D before it starts to move throw-rod 3 by engaging in the open slot 8 thereof. During this 150 movement the vroller 11c of the pivoted connection 11l traverses the part 11iL of the cam 11 thereby bringing contact 99 pass out of engagement between springs 72 and 74. Contact 93 also passes from engagement with springs 94 and 95 but not into engagement withsprings 96 and 97. 'During the further revolution of the crank 7 and while it is moving the throw-rod 3the roller llctraverses the straight portion of the cam 11 and the controller 10 isv not moved. lVhen .the crankl 7 hasI nished moving throw-rod 3 it continues to revolve about 15o further during which time the roller 11c passes through the portion 11b of the cam 4 11 thereby imparting an additional movement to the controller 10 which causes the contact 73 to disengagesprings 72 and 74 and the contact 93 to engage springs 96 and 97. The movement in the reverse direction is of the same character.v Thus it will be seen in this case`also a suliicient interval of time is provided in which the reversal of the controlling means'24 will cause a reversal of movement of the sha ft6 by the establish'- ment of circuits previously described. It will further be understood that, should the collar 43 on shaft 6 be improperly positioned when the auxiliary locking device 16 is energized, the dog 41 cannot descend and cons'equently the circuitI through the coil 54 cannot be established. Likewise should the core 13 be improperly positioned when the auxiliary locking device 15 is energz/.ed the lower end of core 30 wouldnot clearthe sani, d core 13 and no circuit would be establishe through the motor; But in both instance the signal circuit would be ruptured Thus the auxiliary locking devices test the position of the parts of the switch to ascertain whether or not they are correctly positioned.

It will of course be understood that the between springs 100 and 101 without however causing contact 73 to parts comprising the switch machine are properly inclosed or housed; further that the controlling means 23, 24, 24a and levers 21, 22, 20a and interlocking therefor are housed inv a. suitable tower machine, and finally that the conductors-leading from the tower machine to the'switch machine are properly trunked or inclonsed to protect the same from injury and exposure.

The differential transmission mechanism 5 is preferably constructed as follows: 111

4is the motor shaft disconnected from the driven shaft 6 but in alinement therewith. Mounted on the motor shaft 111 and keyed thereto is a gear 393. Keyed on the driven shaft 6 is the internal gear 303. Mounted loosely on the hub of gear 303 and on the motor shaft 111 are two members 398 connected by pins 399 so as to cause theml to move in unison. -These pins are 180o apart. Mounted loosely on the pins 399 are sleeves 397. Mounted fast on each of the sleeves 397.are three pinions 394, 395 and 396. rThe pinion 394 receives motion from the gear 393 and meshes with the internal gear 303. The pinion 395 is of slightly greater diameter than the gear 394, follows the motion of the sleeve 397 and meshes with the internal gear 308 of the pulley 79. The pinion 396 is of slightly less diameter than the pinion 394, follows the rotation of the sleevey 397 and meshes with the internal gear 302 of the pulley 110. The solenoids 76 and 108 are eachprovided with a core 112 connected by. means of a link 200 to two levers forming a bell crank 113, which levers are pivotally supported on the center 201, and one of which levers is longer than the other one, as shown. The bands .78 and 109 pass around the drums 79 and 110, and the free ends of said bands are connected .to the le vers 113. lf `the motor shaft 111 is now rotated and the shaft 6 held against rotation, the gear 393, meshing with the pinions 3.94 will cause them, and the sleeves 397, to rotate. Pulleys 79 and 110 being free to revolve, and the gear 303 being held against revolving movement, the pinions 394 will revolve by traveling on the internal gear 303 carrying the sleeves 397 and the members 398 with them. rlhe rotation and revo- Vlution of the sleeve 397and pinions395 and 396 will cause the latter to tra'vel on the internal gears 308 and 302 and will also caus said gears 308 and 302, and with them the its and pinion 395 will cause the latter to travel on the rigidly held gear 308, causing the sleeves 397, pins 399 and members398 to revolve. travel on gear 303, but since the peripheral speed ofthe pinion 394 is less than that of pinion 395, said pinion 394 will drag-the gear 303 with-it and cause it to'revolve and with it the shaft 6. The pulley 110 being movable will also revolvefby theaction on the pinion 396 on the internal gear 302. Assume now thatthe shaftl 6 is still Yfree to rotate, thatthe magnet .76 is denergized, the band 78 released, and the pulley`7 9 free torevolve. If the magnet 108 is noW ener# gized, the core 112.thereo f will be withdrawn thereby turning the levers 113 around the'center 201 and tightening they band 109 to hold the pulley 110 immovable'. The rotation of the sleeves 397 'and pinion396 will cause the latter to travel on the rigidly held gear 302, causing the sleeves 397, pins 399 and members 398 to revolve. The pinion 394 will attempt to travel on gear 303, but since the peripheral speed of the pinion 394 is greater than that of pinion 396, said pinion 394 will lag behind and will actually push back the gear 303, and cause it to revolve in the opposite direction and with it` the shaft 6. In order to return the cores "112 to their original uppermost position,

when the,l magnets 76 and 108 are dener- 'gized, springs 114 are utilized.

` The controlling means situated in the tower machine may be of any suitable form,

but preferably they are constructedv as fol-v -low s: Since the levers 21, 22 and 20a are, in

the presentinstance, ofthev same construction, only one willbe described. The lever 21 is pivotally supported at 550 and carries a latch v551 by means `of-which the latchI die 552can be raised or lowered. 553 is a staf tionary segment drawn on an arc of a circle whose center isthe pivot 550. 554 is` a movable segment having a segmental slot 555 drawn on an are of a circle whose center is the'pivot 550, and pivoted centrally at 556 directly above the pivot 550. One end of 554 is pivotally connected to the controlling rod 557. whileA the other end is connected to the shaft 125 by means ofthe bifurcated arm 127 and link 126 in such a manner that the rocking movement of 554 is imparted to the shaft 125. The latch die552 is slidingly movable in theslot 555and on the stationary segment 553. Itiwill be evident that such @movement will not cause the movable segcausing the movable segment 554 to rock andl impart movement to the controlling rod 557 and to the shaft 125. The shaft 125 carries fixed to Ait a segmental gear 5051meshi`ng The pinion 394 will attempt tov vto the bar 500.

with a rack 506 attached to thel slidable bar ends of which are beveled. Mounted in the frame bar 507 adjacent to the bar 500 is another slidable bar 504 carrying riveted to it a locking dog 503having a beveled face. The'beveledfaces ofthe locking dogs 501 and 503 coperate with the beveled ends of -the cross locking bar 502. `The bar 504- is connected to the shaft 125 of the switch lever 22 by a rack and segmental gear in the same way as the shaft 125 L In the operation, the rocking of the shaft 125 by the movement of the latch 551 of the lock lever 21, as described, moves the bar 500 (to the right in the figure) and the locking dog 501 shifts the cross locking dog 502 of lever 21 is connected to the right and engages it in front of the locking dog 503 and holds the bar 504 against movement. This prevents the movement of the shaft 125 of lever 22 andrestrains the latter against movement, so as to maintain the lock lever 21 in normal position. The movement of the latch 551 when lock lever 21 isin normal position raises the latch die 552 out of the notch'558 thereby rocking `the 'segment 554 and moving the controlling rod 557 sufficiently to bring the contact'member 26 out of engagement with -the springs 27 and 28 but not sufficiently to bring the contact member 26 into engage ment with the springs29 and 30. The rocking of the segment 554 also moves the interlocking between the levers 21 and 22 by turning the shaft 125 as described but not far enough to cause dog 501 to release cross locking bar 502; therefore switch lever 22 cannot yet be moved. The lever 21 is now moved, the latch die 552 traveling through segment 554 without rocking the same and over the surface of` the segment 553; the controlling rod 557 remaining in its midway position above described. so that the circuits are fully open. When the latch die 552 reaches the other end of the segment 553 the latch 551 is again manipulated, thereby lowering the vlatch die 552 into the other notch 558, rocking the segment 554, causing the contact member 26 to engage springs 29 an'd 30 and releasing the interlocking by turning the shaft 125 into the position shown in Fig. 4, that is lock lever is now reversed and dog 501 releases cross locking bar 502 and switch lever 22 can now be moved.

What is claimed, is:

'1. A power actuated system of switch control comprising: a switch, operating means for unlocking, moving and locking the switch, controlling means for supplying power to said operating means, and means for locking the switch when the operating means are improperly supplied with power.

2. A power actuated system oi switch control comprising: a switch, power actuated operating means for unlocking, moving and locking the switch normally cutoff from power, power actuated auxiliary means for lockingthe switch when power is applied to the operating means, controlling means for supplying power to the operating and auxiliary means, and means actuated lby the operating'means for cutting off power from the operating and auxiliary means.

A power actuated system of switch control comprising: a switch, operating means for unlocking, moving and locking the switch, controlling means for supplying power to the operating means, and auxiliary means for additionally locking the switch if power is supplied to move the switch before unlocking the same. v

4. A power actuated system of switch control comprising: a switch, operating means for unlocking, moving and locking the switch, controlling means for supplying power to the operating means, and auxiliary means, actuated by the power from the controlling means, for locking the switch against movement during the unlocking operation.

5. A power actuated system of switch control comprising: a switch, operating means for unlocking, moving and locking the switch, controlling means for supplying power to the operating means, auxiliary means, actuated by the power from the controlling means, for locking the switch against movement during the unlocking operation, and means actuated by the operating means for cutting off power from the operating and auxiliary means when the unlocking movement of'the operating means has been effected.

6. ln a system or' power actuated switch control, a switch, a lock-rod connected there! to, a locking member for the lock-rod, actuv ating means for moving the locking member and switch, controlling means for supplyingl power to said actuating means, and auxiliary means for locking the locking member when power is supplied to move the switch before releasing .the locking member l'rom the lock-rod.

7. ln a system of power actuated switch control, a switch, a' throw-rod connected thereto, actuating means for said throw-rod normally inoperative, a normally open circuit for said actuating means, means-for closing the"circ,uit through the actuating` means to causemovement ot' the throw-rod, another circuit normally open, and a circuit controller connected to the throw-rod, whereby when the throwrod is physically displaced other than by theactuating means the latter circuit will be closed and power applied to the actuating means to resto're the throw-rod to its original position.

S. A power actuated system of switch control comprising: a switch, operating means for unlocking, moving and locking the switch, two auxiliary locking 4devices which when sequentially actuated by power admit power a plurality of-times to the operating means to eifect the recited cycle of operations thereof, and means for supplying power sequentially to the auxiliary devices.

9. A power actuated system of switch control comprising: a switch, operating means for unlocking, moving and locking the switch, a power actuated auxiliary device which supplies power to the operating means to unlock the switch and locks it,at,I

another point, a `power actuated auxiliarydevice which supplies power to the operat ing means to move the switch and controlled by the operating means to additionally lock the switch unless it has been previously unlocked, and controlling means .for .supplying power to the auxiliary devices. v

10. A power actuated vsystem of switch control comprising: a switch, operatingmeans tor unlocking, moving and locking the switch, a power actuated auxiliary device for locking the switch when power is applied to unlock the switch, a power actuated auxiliary device'controlled by the operating means for additionally locking the switch, unless previously unlocked, when power is applied to move the switch, and controlling means for supplying power to the operating means.

11. A power' actuated system otswitch control comprising: a switch, 4operating -means for unlocking, moving and locking the switch, twov auxiliary locking Adevices which when sequentially moved into locking position by power admit power a plurality of times to the operating means to elfect the recited cycle of operations thereof, said auxiliary locking devices being controlled bythe -position of said operating means, whereby the position of the operating means vis tested, and means Jfor supplying power sequentially to the auxiliary locking devices.

l2. .A power actuated system 'of switch control comprising: a switch, operating means, for unlocking, moving and locking the switch by stages, each stage being controlled by a separate act of the operator, power actuated auxiliary locking means which when moved into lockingv position admits power to the operating means to effect.

the recited cycle of operations thereof', said auxiliary locking means being controlled by the position of said operating means, where! by the position ofthe .operating means is tested, and means lfor supplying power to the auxiliary locking means.

iio

iis

.13. A power actuated Asystem of switch control comprising: a switch, a motor element and connections for unlocking and locking the switch, a motor' element and connections for movingthe switch, controlling means for supplying power selectively to said motor elements in a certain sequence, and means for .locking the vswitch when the operating means are improperly supplied with power.

14. A power actuated system of switch control comprising: a switch, a motor element and connections ritor unlocking and locking the switch, a motor element and con'- nections for moving the switch,- lauxiliary locking `means for locking the switch against actionby one motor element which when in locking position su plies powerto the other control comprising: a switch, a motor element and connections for unlocking and locking the switch, a motor element andcon-` nections for moving the switch, auxiliary locking means for locking the switch against action by one'- motor element which when in lockingposition' supplies power to the other motor element, .controlling meansfor supplying power to said 'auxiliary locking means, and means operated bythe motor element to which power is. supplied for cutting. off ,power1 between the controlling means and auxiliary -locking means..

16. A power 'actuated' system of switch control comprising:l a switch, ia motor lelement" and connectionsl for unlocking and locking the switch, a moto'relement and connections for moving the swltch, controly'fling means forv supplying power selectively vto said motor elements m a certain sequence,

means for locking the switch when the operj ating means are improperly suppliedwith power, and means operated by the motor elef ment moved for cutting oif power between y itself and the controlingmeans 17.. A power actuated s'ystempf switch control comprising: a switch, operatingmeans for unlocking, moving and locking the switch, auxiliary looking means for -the locked supplies power to the operating means, and controllingmeans for supplying power to lock the auxiliary locking means.

18. A power actuated system of switch control comprising: a switch,l operating means for unlocking, moving and locking the switch, auxiliary lockingmeans for the switch, normally-unlocked, but which when locked supplies power to the operating 4means, ,controlling means for supplying ylocking and locking the switch, separately 4time locks the other of said means, control- -ling means for' supplying power to the the other. means, and controlling means for supplying power to the auxiliary locking means to I'ove it into its locking position.

20. A power actuated system of switch control comprising: a switch, means for unoperated-I means for moving the switch, auxiliary locking means which when in its locking position supplies power to actuate one of the aforesaid means and at the same auxiliary locking means t'o move it into its locking position, and means operated by the means to which power is supplied through the auxiliary locking means for cutting olf power between the controlling means and auxiliary locking means.

21. A power actuated system of switch control comprising: .a switch, means for unlocking and locking the switch, sepa- 95 rately operated means for moving. the switch, an auxiliary locking device for each of said means. which when in its locking position with respect to one of said means supplies power to actuate the other of said 10o means, and controlling means for selectively supplying power` to the. auxiliary locking devices to move them into locking position.

,22. 'A power Iactuated system of switch control comprising a switch, means for un- 105 locking and locking the switch, separately operated means for moving the switch, an auxiliary locking device for each independent-means which when in its locking posi'- tion withA respect to one. of said means supplies power to actuate the other of said means, controlling means for selectively lsu-pplyin'g power to the auxiliary locking devices to move them into locking position, and- 'means operated by the means to which 115 `powei` is supplied through the auxiliary switch, normally unlocked, but which when locking'devices for cutting .off power between the controlling'means. and auxiliary locking device. A

23. A power actuated system of switch 120 control comprising: a switch, power actuated operating means for unlocking, moving and locking the s-witch, auxiliary locking means which when in its locking position supplies power to a part of said operating means and locks another part of said operating means, and controlling means for supplying power to and locking said auxiliary locking means.

'24. .A power actuated system of switch 150 control comprising: a switch, power actuated operating means for unlocking, moving and locking the switch, auxiliary locking means which when in its locking position supplies power to a part of said operating means and locks another part of said operating means, controlling means for supplying power to and locking said auxiliary locking means, and means actuated by the part of the operating means moved for cutting off power between the controlling means and the auxiliary locking means.

25. In a system of power actuated switch control, a switch, a lock-rod 4 connected thereto, a- 4solenoid having two oppositely acting coils, a locking member for said lockrod constituting the core for said solenoid,

actuating means for the switch, means for supplying power to said actuating means, and means connected to said locking member for controlling the supply of power to Said actuating means.

26. ln a system of power actuated switch control, a switch, a loclnrod 'connected thereto, a solenoid having two oppositely acting coils, a locking member for said lool;- rod constituting the corefor said solenoid, actuating means for the switch, means for 'supplying power to said actuating means,

means connected to said locking member for controlling the supply of power to said actuating means, and an auxiliary locking device for said locking member, actuated by the application of power to the actuating means.

27. ln a system of power actuated switch control, a switch, a lock-rod connected thereto, a locking member for said lock-rod, means for inoving said locking member into and out of locking position, electrically operated actuating means for moving the.

switch, means for supplying current to'said actuating means, an auxiliary locking solenoid for said locking member actuated by the application of current to the actuating means, and a controller connected to said locking member for controlling the supply of current to said actuating means.

28. ln a system of power actuated switch control, a s witch, a lock-rod connected thereto, a solenoid having two oppositely acting coils, a locking member for said lock-rod constituting the core .for said solenoid, actuating means iior the switch, means for su-pplying power to Asaid actuating means,

Ameans connected to said locking, member for controlling the supply of power to sad actuating means, an` auxiliary locking 'device for said locking member actuated by the application of power to the actuating means, and mea-ns connected to said auxiliary locking device for controlling the supply of power tothe actuating means.

29. ln a system of power actuated switch control, a switch, a lock-rod connected ing means, a controller connected to vsaid locking member for controlling the supply of current to said actuating means, and a 'controller connected to said auxiliary locking solenoid for controlling the supply, of currentto said actuating means.

30. ln a system of power actuated switch control, a switch, a throw-rod connected thereto, a rotatable member for moving said throw-rod, means for unlocking and locking the switch, and an auxiliary locking device which supplies power to said locking means and which prevents rotation of the rotatable member. i 4

31. ln a power actuated system of switch control, a movable member, power actuated means for moving said member in opposite directions, controlling means for supplying power to said actuated means, and a c0ntroller actuated by the movable member which when at rest directs power supplied by the controlling means to move the member in one `di'rection and which when initially moved in one direction by the movable member directs the power supplied by the controlling means in either of two ways whereby the controlling means may move the said member in either direction.

32. ln a power actuated system of switch control, a movable member, power actuated means for moving said member in opposite directions, two power connections to said power actuated means one for each direction of movement of the movable member, controlling means for supplying power to either oi said connections', and a controller actuated by the movable member which when at rest directs power supplied by the controlling means to one of said connections to move the member in one direction and which when initially moved by the movable member directs the power supplied by the controlling means to either connection to move the member in the corresponding direction.

33. A power actuated system of switch 'control comprising, a switch, operating means for unloclnno', moving and locking the switch, means or supplying power a plurality of times to said operating means to effect the movement thereof by stages, each stage being controlled by a separate act of the-operator, means for preventing any stage of movement unless the previous stage has been completed, and means for reversing the movement of the operating means dur ing any stage of movement to restore the parts to their original position.

loy

34. A power actuated system "of .switch control comprising, a switch, a motor element and means for unlocking and locking the switch, a motor element .and means for' moving the switch, auxiliary locking 'means for locking the switch if power is supplied to either motor element out. of proper sequence, and power supply means to 'actuate the motor elements in a certain sequence capable of reversal to supply .power to reversethe movement of the locking or moving means of the motor` elements during the travel of said means.

. 35. A power actuated system of switchy control comprising a switch, operating means for unlocking, moving and locking theswitch, means for supplying powera plurality of times .to said operating means to effect the recited cycle of -movements thereof by stages vin a certain sequence, each stage being. controlled by a separate act ofv` the operator., auxiliary locking means for locking the switch in case power is supplied to 'effect a stage of movement out of its-sef vquence, said power supplying means being capable of reversal during any stage of l movement to restore' the'parts to their original position.

' 36. In a power actuated system of switch control, a switch, a locking member controlling'said switch, power actuated means for moving said locking member in oppositegdirections, controlling'm'eans Afor supplying power to saidactuatinglmeans in cluding a controller" actuated by the locking member which when 'at rest directs the power supplied to move the locking .memberin one directionhand which when initially moved in one direction by the locking memi ber directs the .power supplied -in either of two ways whereby -tlie controllin means may lmove the locking member. in either di- 'when initially moved in oned-irection by the power actuated means 4directs the power suppliedineither of two ways whereby the contr'olling'Q-means may move the power actuated means inf either direction.

3 8. A 'power 'aetuated system of. switch control comprising: a tower machine, a

'source 'of current, a switch, a switch machine having operating means for unlocking, moving and locking the switch, conductors leadingfrom the source of current through the tower machine to the switch machine, and

means included in said switch machine whereby a cross in the conductors locks the switch.

Signed at Pittsburgh, in the county of Allegheny, and State of Pennsylvania, this 9th day ofApril A. D. 1914.

GARDNER B. GRAY.

'VVitnessesz n JoHN'F. SWEENY, GUY' P. THURBER. 

